Trapezoid tooth labyrinth seal structure parameter optimization method

A technology of labyrinth seal and optimization method, applied in design optimization/simulation, electrical digital data processing, special data processing applications, etc., can solve the problem of affecting sealing performance, not forming a general optimization method for labyrinth seal, unable to determine the leakage response level, etc. problem, to achieve the effect of fast solution speed

Inactive Publication Date: 2018-10-26
SHENYANG POLYTECHNIC UNIV
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Problems solved by technology

[0004] The existing research results have verified the influence relationship of the main structural parameters of the labyrinth seal on the leakage. Generally, by changing a certain structural parameter and examining the influence of its change on the leakage, it can be concluded that the change of the sealing structural parameters directly affects the sealing performance, and It is impossible to determine the response level of each parameter value to the leakage under the action of multi-parameter coupling
Most of the existing literature and research results are optimization analysis for a specific use and structure, but no effective general optimization method for labyrinth seals has been formed.

Method used

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  • Trapezoid tooth labyrinth seal structure parameter optimization method
  • Trapezoid tooth labyrinth seal structure parameter optimization method
  • Trapezoid tooth labyrinth seal structure parameter optimization method

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Embodiment Construction

[0041] The optimization method of trapezoidal tooth labyrinth seal configuration parameters takes the lowest leakage as the optimization goal, and takes structural parameters such as tooth profile angle, throttle clearance, and cavity depth (such as figure 2 (shown) is the design variable, and considering factors such as the coupling relationship between the parameters and the processing technology, the optimization problem is expressed as

[0042]

[0043] In the formula, the design variable: x={a,h,T}—{tooth profile angle, throttling clearance, cavity depth};

[0044] Objective function: G—Leakage;

[0045] Constraints: where A represents the cross-sectional area of ​​the sealed cavity.

[0046] Among them, B is the tooth space width A , are the upper and lower limit values ​​of A respectively.

[0047] (2) Determine the leakage calculation formula

[0048]

[0049] Among them, G i Indicates the leakage of the i-th tooth, P i-1 is the pressure of the i-1th too...

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Abstract

The invention discloses a trapezoid tooth labyrinth seal structure parameter optimization method. It is proposed that by taking a minimum value of a labyrinth seal leakage quantity as an objective function of structure parameter optimization, a multi-parameter coupling optimization model is built; optimization solving of labyrinth seal performance under the multi-parameter coupling effect is performed based on an MMA algorithm; and optimal combination design parameters of a labyrinth seal structure is searched for, so that an effective labyrinth seal structure optimization method is formed. The method makes up for an existing structure parameter optimization method under the influence of a single seal structure parameter, performs operation of determining a response level of each parametervalue to the leakage quantity under the multi-parameter coupling effect, and has the characteristics of high solving speed, best optimization value and the like.

Description

Technical field: [0001] The invention provides a trapezoidal tooth labyrinth seal configuration parameter optimization method, in particular to a trapezoidal tooth labyrinth seal multi-structural parameter coupling optimization method. Background technique: [0002] The basic principle of the labyrinth seal is to arrange several annular seal teeth arranged in sequence along the radial direction of the shaft (such as figure 1 shown), so that a non-contact sealing cavity consisting of a throttle gap and an expansion cavity is formed between the two teeth. After the gas enters the sealing cavity, the kinetic energy in the cavity is converted into Heat energy, reducing gas flow velocity, realizing energy dissipation, and achieving sealing effect. [0003] The improvement of labyrinth sealing performance focuses on reducing leakage, improving sealing stability and prolonging service life. The goal of optimizing the structural parameters of the labyrinth seal is to find a numeri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/17G06F30/20
Inventor 汤赫男乔赫廷孟宪松王世杰吕晓仁王慧明
Owner SHENYANG POLYTECHNIC UNIV
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